Derivatives

invaluably

But Federer's right to tackle the task optimistically is underlined by the readiness of McEnroe, a superb champion who has become an invaluably cogent broadcaster on tennis, to identify strengths the Swiss has in common with Sampras.

Rather, they were invaluably aided by sermons that came from the pulpits of religious leaders who preached an obligation of obedience to the secular laws.

These, invaluably, flesh out the rather basic dance notations which have survived from the period, written in the Beauchamps/Feuillet system.